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YAML ↔ JSON converter

JSON ↔ indentation YAML for common maps, lists, and scalars. No anchors/tags. Nothing is uploaded.

Convert

Ready

How it works

JSON → YAML uses 2-space indent, plain scalars when safe, JSON-style quotes when needed.

YAML → JSON parses a practical subset: indented maps/lists, quoted strings, numbers, booleans, null. No anchors, tags, merge keys, or multi-document streams.

Tabs are rejected. For full YAML 1.2 edge cases, use offline tooling with a complete parser.

Examples

server:
  host: localhost
  port: 8080
features:
  - auth
  - cache

{
  "server": { "host": "localhost", "port": 8080 },
  "features": ["auth", "cache"]
}

FAQ

Parse error? Often tabs, anchors, or complex multiline (| >). Simplify structure.

Types? Unquoted true/false/null/numbers are typed; quoted values stay strings.

Duplicate keys? Later keys win in this subset parser.

Is this js-yaml? No CDN. A small subset ships in the page.

Uploaded? Never.

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